toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
return 'ElinkCheckupHistoryData('
'heartRate: $heartRate, '
'spo: $spo%, '
'bk: $bk, '
'sbp: $sbp mmHg, '
'dbp: $dbp mmHg, '
'rr: $rr, '
'sdann: $sdann, '
'rmssd: $rmssd, '
'nn50: $nn50, '
'pnn50: $pnn50, '
'time: ${DateTime.fromMillisecondsSinceEpoch(time)}, '
'rri: $rri)';
}